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Finding the Fourth Proportional to 282,639.40, 423,959.10 and 72,293.80

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Solution

The fourth proportional to 282,639.40, 423,959.10 and 72,293.80 is: 108,440.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,639.40 : 423,959.10 = 72,293.80 : x
  2. Step 2: Convert to fraction form
    282,639.40/423,959.10 = 72,293.80/x
  3. Step 3: Cross multiply
    282,639.40x = 423,959.10 × 72,293.80
  4. Step 4: Simplify right side
    282,639.40x = 30,649,614,383.58
  5. Step 5: Solve for x
    x = 30,649,614,383.58/282,639.40
  6. Step 6: Final answer
    x = 108,440.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.